Method for preparing a door face to retain a unit lock in position



Jan. 17, 1967 F. J. RUSSELL ET AL v 3,298,094

' METHOD FOR PREPARING A DOOR FACE TO RETAIN A UNIT LOCK IN POSITION Filed Oct. 28, 1963 2?: ill

u llllilmlii 3o 8 L, I6 32 1: 43C? 23 F j/ 3 lo R0652 J2 Now/v 23 I INVENTOR-S ATTOEZNEVS United States Patent O 3,298,034 METHOD FOR PREPARiNG A DOOR FACE TO RETAIN A UNIT LOCK 1N POSITION Fred J. Russell, 8635 Otis St., South Gate, Calif. 90280,

and Roger .I. Nolin, Monterey Park, (Ialitl; said Nolin assignor to said Russell Filed Oct. 28, 1963, Ser. No. 319,282 2 Claims. (Cl. 29428) The invention relates to installation techniques in preparing a door for installation of a lock of a particular kind and relates additionally to preparing a retention means to cooperate with the installation. The lock involved is one which customarily is inserted inwardly of the edge of the door, requiring a relatively large cutout to accommodate the lock casing or housing.

There is a certain line of locks of a relatively rugged type, with great security potential, which requires a technique for installation slightly diiferent from the technique and practices employed in the location of ordinary residential locks. The lock under consideration, although known by various names, consists of a housing substantially as thick as the door thickness itself and having a length, at and adjoining the door edge area, which extends a relatively substantial distance from the edge of the door. Initial steps in preparing a door are disclosed in applicants copending application, Serial No. 319,117, filed October 28, 1963, now Patent No. 3,256,918, entitled Method for Preparing a Door for Installation of a Look Unit.

It is among the objects of the invention to provide a new and improved method for preparing a door for the insallation of that type of lock which is inserted into a notch cutout in the edge of the door and which only clamps the door faces, the method being especially directed to means preventing the lock from shifting in an edgewise direction.

Another object of the invention is to provide a more rapid method for installing in a door a lock of the type which only clamps to the door faces in a recess cut edgewise into the door.

Still another object of the invention is to provide a new and improved method for reliably retaining a lock in a door wherein the lock is one which is inserted edgewise into a cutout at the door edge and which only clamps to the door faces.

With these and other objects in view, the invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter set forth, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings:

FIGURE 1 is a fragmentary side elevational view of a door prepared by the method under consideration.

FIGURE 2 is a side perspective view of a retaining plate adapted to be made use of in the method.

FIGURE 3 is a fragmentary longitudinal sectional view taken on the line 3--3 of FIGURE 1.

FIGURE 4 is a side elevational view of a fragment of door showing a lock housing and accompanying retaining plate in position.

FIGURE 5 is a cross-sectional view taken on the line 5-5 of FIGURE 4.

In an embodiment of the invention chosen for the purpose of illustration, there is shown a door having an edge 11 and opposite faces 12 and 13. A cutout 14 extends transversely inwardly into the door 10 from the edge 11. A cutout of the type made reference to may be made by boring a hole 15 through the door 10 from one or another of the faces 12 or 13 through the opposite face as an initial step. Thereafter, saw cuts are made "ice from the edge 11 of the door 10 whereby to form, respectively, upper and lower parallel edges 16 and 17. The saw cuts forming the edges 16 and 17 extend in- Wardly until they break through the edges of the hole 15, whereupon a cutout piece of the door (not shown) is removed.

A center 18 of the hole 15 is normally the center of rotation of retracting mechanism (not shown) contained in a lock housing indicated generally by the reference character 20. The lock housing 20 has, respectively, upper and lower Walls 21 and 22 terminating in a rounded inside wall 23. The lock housing 20 is inserted into the cutout 14 to a position where the rounded inside wall 23 clears the adjacent wall of the hole 15 and where the upper and lower walls 21 and 22, respectively, fit snugly within the upper and lower edges 16 and 17.

Once in position, a lock housing of the type here under consideration is clamped to the opposite faces 12 and 13 of the door It by respective escutcheon plates 24 and 25 which are forced into frictional engagement with the said faces by turning one or both of opposite collars 26 and 27, respectively, which are in threaded engagement with opposite threaded hubs 28 and 29, respectively. The collars 26 and 27 bear against the escutcheon plates 24 and 25, forcing them into clamping engagement with the door 10. Although this engagement is sufiicient to mount the lock housing 20 in the cutout 14, it is insufficient to prevent a transverse shift of the lock housing 20 in the cutout 14 away from the edge 11.

Ordinarily, the escutcheon plates 24 and 25 cover an area of an extent sufiicient to amply hide all portions of the lock housing 20 to the left of ridges 19 and 19', as shown in FIGURE 5.

In order to provide a method for preventing the edgewise dislodgment mentioned above, one or more recesses 30, 31 are bored in one face of the door 10, as for example, the face 13 in the chosen embodiment. These recesses 30, 31 are spaced from the edge of the hole 15, leaving undisturbed portions 32 and 33, respectively, of the door face 13. Further still, these recesses 30, 31 extend only a short distance into the door 10 from the edge 11 as suggested by the location of a bottom 35 of one of the recesses 31, as shown. in FIGURES 3 and 5. The other recess 30, if more than one recess is employed, may have its bottom 34 at a corresponding depth. It is further important to note that the entire area covered by the recesses 30 and 31 lies well within the area defined by the escutcheon plate 25.

In contemplation of the practice of the method, the method comprehends making use of a retaining plate, indicated generally by the reference character 47, which consists of a disc 36 having a perimeter 37 which extends outside of the area occupied by the recesses 30 and 31 but which does not extend outside of the area occupied by the escutcheon plate 25. The disc employs inner offset portions 38 and outer offset portions 39 which, together with the thickness of the disc 36, adequately fill the space between the escutcheon plate 25 and the face 13 of the door 10. Tongues 40 and 41 are helpful in centering the disc 36 in a rotational direction with respect to the hub 29 over which an aperture 42 of the disc 36 extends.

One or more tabs like the tabs 43 and 44 are formed from the metal of the disc 36 by punching them out and bending them in an inward] direction with respect to an inner face 45 of the disc 36. The method comprehends punching out or otherwise forming the tabs 43 and 44 so that their edges 43 and 44', respectively, register against the corresponding wall of recesses 30 and 31, respectively, when the lock housing 20 is in a position wherein its edge is flush to the door edge 11, as shown in FIGURE 4.

In the employment of the method, it is customary to first form the disc 36 and the tabs 43 and 44 thereon in an appropriate direction and spaced so that they, when in use, will lie in a position spaced from the wall of the hole but still lying within the area occupiel by the escutcheon plate 25. This precaution is automatically taken care of by forming the perimeter 37 of the retainer plate 47 small enough so that it lies within the perimeter of the escutcheon plate 25. Customarily also, the retainer plate will be mounted over the threaded hub 29 prior to application thereto of the escutcheon plate 25. Therefore, when the door 10 is prepared, first with the cutout 14 and then with the recesses 30 and 31 in the manner heretofore described, the tabs 43 and 44 will be moved into positions in the recesses 30 and 31, respectively, to the locations suggested in FIGURE 3 and FIG- URE 4. Thereafter, subsequent to clamping of the lock housing in position by manipulation of the collars 26 and 27, the tabs 43 and 44 will be anchored in their positions within the respective recesses 30 and 31 and therefore prevent the lock housing from shifting outwardly in a transverse direction. Moreover, when the threaded hub 29, for example, is provided with a slot 46 for reception of the tongue 40, the tabs 43 and 44 are anchored rotatively in relation to the lock housing 20; and the relatively close fit between the aperture 42 of the disc 36 and the diameter of the hub 29 anchors the tabs 43 and 44 transversely in relation to the lock housing 20.

It will appear, therefore, from the foregoing description that the method is an extremely simple one for securely anchoring the lock housing 20 in its position in the door 10, inasmuch as there need be relatively few operations, namely, boring of the recesses 30 and 31, and inserting the tabs 43 and 44 in the recesses 30 and 31 when the lock housing 20 is being mounted on the door 10 in the regular way.

While the invention has herein been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices.

Having described the invention, what is claimed as new in support of Letters Patent is:

1. In a door and lock housing assembly of the kind wherein the door has a cutout slot from one edge extending through the door from face to face and wherein a lock housing extends into said cutout slot from said edge and is retained partially by an escutcheon plate located against a face of the door in position covering a selected area, a method for preparing a door for an choring said housing against edgewise removal comprising forming at least one recess on one face thereof to receive a retaining means extending from a retaining plate at a location spaced from the cutout slot and at the same time falling within the area covered by the escutcheon plate, forming a retaining plate with a perimeter no larger than said escutcheon plate, forming a tab on said retaining plate and locating said tab into said recess when the lock housing is assembled on said door.

2. In a door and lock housing assembly of the kind wherein the door has a cutout slot from one edge extending through the door from face to face and wherein a lock housing extends into said cutout slot from said edge and is retained partially by an escutcheon plate located against a face of the door in position covering a selected area, a method for preparing a door for anchoring said housing against edgewise removal comprising forming at least one recess on one face thereof at a location further removed from said one edge than the cutout slot to receive a retaining means extending from a retaining plate at a location spaced from the cutout slot and at the same time falling within the area covered by the escutcheon plate, said retaining plate having a perimeter no larger than said escutcheon plate, forming an extending tab on said retaining plate with a surface which engages the recess in a direction which retains the lock housing assembly from moving out of position in said cutout slot when the lock housing is assembled on the door, and inserting said tab in said recess during application of said retaining plate to the adjacent face of the door.

References Cited by the Examiner UNITED STATES PATENTS 1,973,971 9/1934 West. 2,542,130 2/1951 Friend 292337 X 2,751,243 6/1956 Biblin 292357 X 3,048,436 8/1962 Schiowitz 45l X 3,096,113 7/1963 Polzin 292337 X 3,179,459 4/1965 Lint 292l69 X CHARLIE T. MOON, Primary Examiner. 

1. IN A DOOR AND LOCK HOUSING ASSEMBLY OF THE KIND WHEREIN THE DOOR HAS A CUTOUT SLOT FROM ONE EDGE EXTENDING THROUGH THE DOOR FROM FACE TO FACE AND WHEREIN A LOCK HOUSING EXTENDS INTO SAID CUTOUT SLOT FROM SAID EDGE AND IS RETAINED PARTIALLY BY AN ESCUTCHEON PLATE LOCATED AGAINST A FACE OF THE DOOR IN POSITION COVERING A SELECTED AREA, A METHOD FOR PREPARING A DOOR FOR ANCHORING SAID HOUSING AGAINST EDGEWISE REMOVAL COMPRISING FORMING AT LEAST ONE RECESS ON ONE FACE THEREOF TO RECEIVE A RETAINING MEANS EXTENDING FROM A RETAINING PLATE AT A LOCATION SPACED FROM THE CUTOUT SLOT AND AT THE SAME TIME FALLING WITHIN THE AREA COVERED BY THE ESCUTCHEON PLATE, FORMING A RETAINING PLATE WITH A PERIMETER NO LARGER THAN SAID ESCUTCHEON PLATE, FORMING A TAB ON SAID RETAINING PLATE AND LOCATING SAID TAB INTO SAID RECESS WHEN THE LOCK HOUSING IS ASSEMBLED ON SAID DOOR. 